CN108455073B - Air type buffer piece - Google Patents

Air type buffer piece Download PDF

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Publication number
CN108455073B
CN108455073B CN201810143532.9A CN201810143532A CN108455073B CN 108455073 B CN108455073 B CN 108455073B CN 201810143532 A CN201810143532 A CN 201810143532A CN 108455073 B CN108455073 B CN 108455073B
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CN
China
Prior art keywords
air
airbag
shaped portion
belt
air cushion
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Active
Application number
CN201810143532.9A
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Chinese (zh)
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CN108455073A (en
Inventor
桥本武志
水口弘美
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Konica Minolta Inc
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Konica Minolta Inc
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Publication of CN108455073A publication Critical patent/CN108455073A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/02—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
    • B65D81/05—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents
    • B65D81/051—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents using pillow-like elements filled with cushioning material, e.g. elastic foam, fabric
    • B65D81/052—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents using pillow-like elements filled with cushioning material, e.g. elastic foam, fabric filled with fluid, e.g. inflatable elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/28—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/05—Interconnection of layers the layers not being connected over the whole surface, e.g. discontinuous connection or patterned connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/08—Interconnection of layers by mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/02—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
    • B65D81/05—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents
    • B65D81/053—Corner, edge or end protectors
    • B65D81/054—Protectors contacting two generally perpendicular surfaces of the packaged article, e.g. edge protectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/68—Containers, packaging elements or packages, specially adapted for particular articles or materials for machines, engines or vehicles in assembled or dismantled form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/02—2 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B32B2250/242—All polymers belonging to those covered by group B32B27/32
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/56—Damping, energy absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2553/00—Packaging equipment or accessories not otherwise provided for
    • B32B2553/02—Shock absorbing

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Buffer Packaging (AREA)

Abstract

The invention provides an air type buffer material which is difficult to break and has high buffer performance against rapid impact. An intermediate band-shaped portion (3) is provided between the airbags (1, 2). An airflow passage (6) is formed inside the intermediate belt-shaped portion (3) having the folded shape, and the airbags (1, 2) communicate with each other through the airflow passage (6).

Description

Air type buffer piece
Technical Field
The present invention relates to an air cushion inserted into a gap between an article and a packaging box for protecting the article when the article to be packaged is stored in the packaging box.
Background
In the transportation of articles such as printers, copiers, and PCs, it is important how to protect the articles from impacts during the transportation. In order to fill the gap between the packing box and the article in accordance with the above requirements for protecting the article, a foamed resin cushion is mainly used. However, from the viewpoint of reducing the environmental load, it is considered that the air cushion is preferably used.
As a conventional air-type cushion member, an air-type cushion member having two or more air cells as described in patent document 1 is known.
Fig. 15 is a diagram showing an outline of the air cushion in patent document 1.
In the figure, a state is shown in which two air cushions a1, a2 are connected in the vertical direction, and each of the air cushions a1, a2 has a structure in which 3 air bags 51, 52, 53 are connected in a triangular tube shape. By forming the 3 airbags in a triangular tubular structure in this manner, gaps occurring at corners of the packaging box or the like are filled, and articles (hereinafter referred to as "packaging objects") stored in the packaging box are protected.
The adjacent air bags 51, 52, 53 are partitioned by a heat seal portion 81 in the figure, but the length of the heat seal portion 81 is made slightly shorter than the vertical length of the air bags 51, 52, 53 so that passages 70u, 70v communicating with the adjacent air bags 51, 52, 53 are present on both sides of the heat seal portion 81.
The passages 70u, 70v have a function of releasing the air inside to the adjacent airbag when one airbag 51(52, 53) receives an impact from the outside, thereby preventing the airbag 51 from being ruptured by the impact and obtaining a cushioning effect.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 8-230945
Patent document 2: japanese laid-open patent publication No. 7-291357
Disclosure of Invention
Technical problem to be solved by the invention
However, the air cushion of the above-described structure is used by being tightly inserted into a gap between the packaging box and the object to be packaged. In particular, if the object to be packaged has a corresponding weight, the package box receives a rapid vibration or impact from the outside when transported by a vehicle or the like, and a large external force is applied to the air bag of the air cushion.
For example, when the airbag 51 shown in fig. 15 is pressed by a large external force due to vibration or impact, air in the airbag 51 that is pressed sharply escapes to the adjacent airbags 52 and 53 through the passages 70u and 70v in a short time.
Since the air bag 51 after the rapid air leakage does not have a cushioning force, a large external force due to the vibration or impact is directly applied to the object to be packaged, which may cause a problem of breakage of the object to be packaged.
The purpose of the present invention is to provide an air cushion material that can maintain a cushion effect even when a sudden and large external force is suddenly applied to an airbag.
Technical scheme for solving technical problem
In order to achieve the above object, an air-type cushion according to the present invention is characterized in that a band-shaped portion is provided between a1 st cell and a2 nd cell in which air is sealed, side edges of the 1 st cell and the 2 nd cell are connected via the band-shaped portion, an airflow passage communicating the 1 st cell and the 2 nd cell is formed in the band-shaped portion, and at least a portion of the band-shaped portion including the airflow passage is folded in a middle of the 1 st cell and the 2 nd cell.
Here, it is preferable to include a posture maintaining means for maintaining the 1 st airbag and the 2 nd airbag in a mutually folded posture with the folded portion of the belt-like portion positioned inside.
The air flow passages may be provided at least at two positions symmetrical in the longitudinal direction of the belt-shaped portion.
The airflow path may include a1 st path that opens into the 1 st air bag, a2 nd path that is provided along the longitudinal direction of the belt-shaped portion, and a 3 rd path that opens into the 2 nd air bag, and the 1 st path and the 3 rd path are connected via the 2 nd path.
The folded portion of the belt-shaped portion may be welded along the longitudinal direction of the belt-shaped portion to form the 1 st and 2 nd airbags with 1 space therebetween.
Preferably, the 1 st air bag of the 1 st and 2 nd air bags is disposed so as to sandwich a corner portion of the object to be packaged and protect one surface, and the 2 nd air bag is disposed so as to sandwich the corner portion of the object to be packaged and protect the other surface.
Preferably, at least a portion of the strip portion including the air flow path is a portion for being disposed to face a corner portion of the object to be packaged.
The packaging object may be an article to be transported.
Effects of the invention
Since the belt-shaped portion in which the air flow path is formed is folded, the air flowing from the airbag on the side receiving the external force due to vibration or impact travels to open the air flow path of the folded belt-shaped portion. Since the folded portion of the air flow path has a large flow path resistance, it takes a certain time for the air to move to the adjacent air cell, and the air cell on the side receiving the external force can maintain a certain damping force during this time. Further, since air is gradually released to the adjacent airbag through the airflow path in accordance with the increase in the internal pressure, it is possible to avoid the airbag receiving the external force from being ruptured.
Drawings
Fig. 1 is a view showing an external appearance of an air cushion according to an embodiment of the present invention.
3 fig. 3 2 3 is 3 a 3 sectional 3 view 3 when 3 the 3 air 3 cushion 3 is 3 cut 3 at 3 a 3 position 3 of 3 line 3 a 3- 3 a 3' 3 of 3 fig. 3 1 3. 3
Fig. 3 shows a state where the air cushion is deployed.
Fig. 4(a) is a view showing the intermediate strip-shaped portion in a folded state, and (B) is a view showing a state in which a portion provided with the air flow passage is cut at a position of a line B-B' in fig. 4(a) in the intermediate strip-shaped portion.
Fig. 5(a) is a view showing an arrangement example when the air-type cushion member is attached to a copying machine as a packaging object, and (b) is a view showing the air-type cushion member in a state of being accommodated in a packaging box. (c) The air cushion member is a schematic view showing a case where the air cushion member is disposed in a gap at a corner of an object to be packaged, and (d) is an enlarged cross-sectional view of an intermediate band-shaped portion of the air cushion member.
Fig. 6(a) to (d) are diagrams showing the case where air flows through the air flow passage of the intermediate belt-shaped portion when the air cushion receives external pressure.
Fig. 7(a) shows an air cushion according to the present embodiment used as an evaluation target of the cushioning force. (b) A one-piece air cushion material as a comparative example is shown. (c) A case of a drop test using the drop test apparatus is shown.
Fig. 8(a) is a graph showing the acceleration applied to the hammer of the drop test apparatus when the hammer collides against the air cushion of the present embodiment with a time accuracy of several milliseconds. (b) The acceleration applied to the hammer when the hammer collides against the air cushion of the comparative example is shown in a graph with a time accuracy of several milliseconds.
Fig. 9(a) to (c) are views schematically showing the steps of manufacturing the air-type cushion member.
Fig. 10(a) to (d) are schematic views showing the following steps for manufacturing the air-type cushion member of fig. 9.
Fig. 11(a) and (b) show the air cushion in a state where the two air cells are welded to the side opposite to the folded portion of the intermediate belt-shaped portion so as to open in an L-shape with the intermediate belt-shaped portion facing inward.
Fig. 12(a) to (c) show a modification of the air cushion in which airflow passages are formed at both ends in the longitudinal direction of the intermediate belt-shaped portion.
Fig. 13(a) to (c) show a modification of the air cushion when the air flow path has a crank shape including a portion extending in the longitudinal direction of the intermediate strip portion.
Fig. 14 shows a modification of the air cushion in which only the portion of the intermediate strip-shaped portion including the air flow passage is folded.
Fig. 15 is a schematic diagram showing the structure of a conventional air-type cushion having a plurality of air cells.
Reference numerals
1. 2: an air bag; 1 r: a back-side sheet portion; 1 s: a front side sheet portion; 2 r: a back-side sheet portion; 2 s: a front side sheet portion; 3: an intermediate band-shaped portion; 3e1, 3e 2: an end portion vicinity portion; 3 t: a top portion; 3v, 3 r: a root portion; 4 m: a front side sheet portion; 5 m: a back-side sheet portion; 6. 15, 16, 17, 18, 19: an air flow path; 10. 20: an air-type cushion member; 100: a copier; 200: packing case (food)
Detailed Description
Hereinafter, embodiments of the air cushion according to the present invention will be described with reference to the drawings.
[1] Integral structure of air type buffer piece
Fig. 1 is an external perspective view of an air cushion 10 according to embodiment 1. As shown in the figure, the air cushion 10 includes two air cells 1 and 2 and an intermediate strip portion 3 existing between the two air cells 1 and 2. 3 fig. 3 2 3 is 3 a 3 sectional 3 view 3 when 3 the 3 air 3 cushion 3 10 3 is 3 cut 3 at 3 a 3 position 3 of 3 line 3 a 3- 3 a 3' 3 of 3 fig. 3 1 3. 3
As shown in fig. 2, each of the airbags 1 and 2 includes front- side sheet portions 1s and 2s and back- side sheet portions 1r and 2r, and the intermediate band-like portion 3 is formed by welding edges 10a and 10b of the front-side and back- side sheet portions 1s, 1r, 2s, and 2r, folding the center portion so as to protrude upward, and welding the root portion thereof.
Then, the edges 10c are welded together with the air filled in the airbags 1 and 2, thereby forming the shape shown in fig. 1.
In addition, the air blowing port may be welded to a desired portion with the air blowing port left, and the air blowing port may be welded to a sealed state after the entire body is filled with air.
The grid parts Se1, Se2, Se3 of fig. 1 are fusion-bonded parts. In the present embodiment, each of the airbags 1 and 2 has a substantially square shape in a plan view, but is not limited thereto.
The front sheet portions 1s and 2s of the airbags 1 and 2, the front sheet portion 4m of the intermediate belt-shaped portion 3, the back sheet portions 1r and 2r, and the back sheet portion 5m of the intermediate belt-shaped portion 3 are connected to each other. In a state where the sealing by the fusion bonding is not performed, as shown in fig. 3, the front side sheet portions 1s, 2s of the airbags 1, 2 and the front side sheet portion 4m of the intermediate belt-shaped portion 3, the back side sheet portions 1r, 2r and the back side sheet portion 5m of the intermediate belt-shaped portion 3 can be developed into one long sheet 10 s. Thus, the airbags 1 and 2 and the intermediate belt-shaped portion 3 can be integrally formed of a resin sheet member having high airtightness. Here, for example, low-density polyethylene can be used as a member of the airtight resin sheet.
The air cushions 10 may be configured by separately producing the air bags 1 and 2 and the intermediate strip portion 3 and connecting them.
[2] Structure of the intermediate band-shaped portion 3
As shown in the cross-sectional view of fig. 2, the intermediate belt-like portion 3 is formed into a folded shape by folding two front and back sheet portions 4m, 5m into a mountain shape at a central portion and overlapping them. In the folded shape portion, the base portion of the folded shape portion of the intermediate belt-like portion 3 is sealed by fusion along the longitudinal direction of the intermediate belt-like portion 3 (X direction in fig. 4 a) except for a portion to be an air flow path with respect to the front and rear sheet portions 4m and 5 m.
Fig. 4(a) is a view of the intermediate strip portion 3 and its peripheral portion cut out of the air cushion 10. As shown in the drawing, a welded portion Se13 where 4 resin sheets of the intermediate belt-shaped portion 3 are welded is formed along the longitudinal direction X, whereby the intermediate belt-shaped portion 3 is folded into two and 1 space is divided into two spaces of the airbags 1 and 2.
The fusion portion Se13 is interrupted halfway on the end side (end portion vicinity portion 3e1) in the longitudinal direction X of the intermediate band-shaped portion 3, and is connected to the fusion portion Se 12. The fusion Se12 extends parallel to the fusion Se11 at the edge 10c to the top (fold portion) 3t of the intermediate band-shaped portion 3.
The same welded portion is also present on the back side of the intermediate band-like portion 3, and the portion surrounded by the welded portion (the portion having the width d1 between the welded portion Se11 and the welded portion Se 12) serves as the air flow passage 6 communicating the two airbags 1, 2.
Further, no airflow passage is formed on the opposite side end portion 3e2 side of the intermediate belt-shaped portion 3.
Fig. 4(B) is a cross-sectional view of a portion where the air flow path 6 is provided, cut at a position of a line B-B' in fig. 4(a), in the intermediate belt-shaped portion 3. As shown in fig. 4(b), the front-side sheet portion 4m and the back-side sheet portion 5m are overlapped and folded at the top portion 3t of the intermediate strip-shaped portion 3, and the intermediate strip-shaped portion 3 and the root portions (root portions) 3v, 3r of the airbags 1, 2 are concavely folded, so that the flow path resistance in the air flow path 6 is high, and the air from one airbag is unlikely to flow to the other airbag. When the internal pressure of one of the airbags becomes equal to or higher than a predetermined value, the airbag enters the airflow path 6 so as to push and open the front-side sheet portion 4m and the back-side sheet portion 5m of the intermediate belt-like portion 3.
The height h1 of the intermediate belt-shaped portion 3 (fig. 4 a) is appropriately determined so that the flow path length cu1 of the intermediate belt-shaped portion 3 (which indicates the stroke when the air flow path 6 travels along the short side of the intermediate belt-shaped portion 3) is a dimension necessary for ensuring a path when the air enters by pushing the gap. In particular, when a rapid pressing force is applied to one of the airbags 1, the height h1 and the width d1 of the airflow path 6 are determined so that the air does not immediately escape to the other airbag 2 due to the flow path resistance of the folded portion, and the air moves with a certain time delay.
However, as described below, as a practical use form of the air-type cushion material 10, since the air cells 1 and 2 are arranged at the corners of the packaging object in an L-shaped manner with the intermediate strip-shaped portion 3 being inside (see fig. 5(c)), the height h1 of the air flow path 6 is preferably set to a height at which the top portion 3t of the intermediate strip-shaped portion 3 does not contact the packaging object in this state.
[3] Form of use
A desirable use example of the air cushion having the above-described structure will be described. For example, when the copier 100 shown in fig. 5(a) is packaged in a packaging box as a heavy object, the air cushion members shown in fig. 10a, 10b, 10c, and 10d … … are provided at the locations of the copier corresponding to the corner portions of the packaging box, and are accommodated in the packaging box.
In a normal state where no external force is applied to the packing box, as shown in fig. 5(b), the air cushions 10a, 10b, 10c, and 10d … … are inserted into the gaps between the wall surfaces of the packing box 200 and the side surfaces of the copier 100.
As shown in fig. 5(c), the airbags 1 and 2 are provided at the corners of the copier 100 by bending the airbags 1 and 2 so that the intermediate belt-like portions 3 are located inside.
The fold of the intermediate band-shaped portion 3 is set to a height h1 (fig. 4(a)) to such an extent that it does not interfere with the object to be packaged, and can be inclined in a free direction. This process will be described with reference to fig. 6(a) to (d).
Here, a case is assumed where a vehicle transporting the copier 100 as a packaging object applies an emergency brake or the like and a large external force acts on the packaging box 200. For example, when an external force is applied in a direction indicated by an arrow (1) in fig. 6(a), the external force starts to press the airbag 1. The other airbag 2 is not applied with an external force, and therefore maintains a normal state.
However, since the air flow path 6 is in a closed state, the air in the airbag 1 is compressed without being released to the airbag 2 immediately after the external force is applied. Therefore, the airbag 1 functions as a cushion material effective against the pressing force by the external force.
The pressure in the airbag 1 increases and this pressure acts on the intermediate belt-like portion 3, as a result of which the cross section of the intermediate belt-like portion 3 changes from the state shown in fig. 5(d) to the state shown in fig. 6 (b). That is, since the airbag 1 on the side receiving the impact expands and deforms and expands laterally as indicated by the arrow (2), the intermediate belt-like portion 3 is pressed and inclined in the direction indicated by the arrow (3).
Thereby, as shown by an arrow (4), the contact portion of the front-side sheet portion 1s and the back-side sheet portion 1r at the concave folding portion of the root portion 3r on the airbag 1 side is opened.
When the external force is further increased, the internal pressure of the airbag 1 increases, the intermediate belt-like portion 3 is inclined toward the airbag 2 side, and along with this inclination, as shown in fig. 6(c), air enters the airflow passage 6 on the side close to the airbag 1, and this air gradually opens between the front-side sheet portion 4m and the back-side sheet 5m in the airflow passage 6 of the intermediate belt-like portion 3 as shown by an arrow (5).
as a result, the angle α formed by the front sheet portion 4m and the back sheet portion 5m from the root portion 3r to the top portion 3t of the intermediate belt-like portion 3 increases, the internal pressure of the airbag 1 increases, and this time, the effect is to open the fold portion of the top portion 3 t.
the angle β formed by the front-side sheet portion 4m and the back-side sheet portion 5m from the top portion 3t to the root portion 3v of the intermediate strip portion 3 increases due to the air entering beyond the fold portion, and after that, the concave fold portion of the root portion 3v also opens as shown by an arrow (6) in fig. 6(d), and the airflow path 6 opens from the airbag 1 to the airbag 2 side, so that the air on the airbag 1 side is released to the airbag 2 side (arrow (7)).
Since there is a time difference from when a large external force suddenly starts to act until the air passage 6 releases the air in the airbag 1 to the other airbag 2, the one airbag 1 functions as an effective cushion against the external force immediately before the start, and the air is released to the other airbag 2 before the upper limit of the cushion action of only the airbag 1 is exceeded, whereby the protection of the airbag 1 and the continuation of the appropriate cushion action can be realized.
When the external force indicated by the arrow (1) disappears, the air is gradually returned to the airbag 1 side with the lapse of time in order to balance the internal pressure, and the airbags 1 and 2 are restored to the state close to fig. 5 (d). Since the air moves through the air flow path 6, the balance of the volume between the airbags 1 and 2 is naturally maintained, and the cushioning performance can be continuously exhibited for a long period of time.
[4] Evaluation of cushioning Properties
The inventors performed an evaluation of the cushioning performance of the air cushion material using the air cushion material 10 having the size shown in fig. 7(a) and the single-body air cushion material 20 having the size shown in fig. 7(b) as evaluation targets, using the drop test device 300 shown in fig. 7 (c).
In the air-type cushion material 10 shown in fig. 7(a), the lateral width of the air cells 1 and 2 of the air-type cushion material 10 shown in fig. 1 is 145mm, and the vertical width is 110 mm. The width of the air flow path 6 was set to 40 mm. As shown in fig. 7(b), the one-piece air cushion 20 is a one-piece air cushion composed of 1 cell without an intermediate strip portion, and has a lateral width of 145mm and a vertical width of 110 mm.
Fig. 7(c) shows a test environment of a drop test performed by the drop test apparatus 300. The air cushions 10 and 20 were placed on a base 302 of the drop test apparatus 300, and a 1.2kg weight 303 was dropped from a base 301 having a height of 300 mm.
An acceleration sensor 304 is attached to the hammer 303, and when the hammer 303 collides with the air cushions 10 and 20, the acceleration (G value) measured by the acceleration sensor 304 attached to the hammer 303 is plotted in a graph with 1 millisecond as a unit. Since the acceleration here is the value of the impact received by the cushion body, it means that the smaller the acceleration, the higher the cushion performance.
Fig. 8(a) and (b) are graphs showing the results of the drop test of the air cushion 10 of the present embodiment and the air cushion 20 of the comparative example, respectively.
In the graphs of fig. 8(a) and (b), the negative acceleration represents the acceleration acting on the weight 303 when the weight 303 bounces off the air cushions 10 and 20.
When the air cushion 20 as a single unit of the comparative example is used as the cushion material of the hammer 303, as shown in fig. 8(b), the hammer comes into contact with the air cushion 20 at time t11 to generate a cushion force by the air cushion 20, and the acceleration of the hammer reaches the maximum value (11G) at time t 12.
Then, at time t13, the acceleration of the hammer 303 becomes "0", and thereafter, a negative acceleration is generated. This represents a negative acceleration due to the rebound of the hammer 303 at the unitary air cushion 20. Thereafter, at the time t14, the acceleration reaches a negative maximum value (about-5G).
In contrast, when the air cushion 10 is used as the cushion of the weight 303, the acceleration generated by the acceleration sensor 304 reaches the maximum value (8.4G) at time t2 after the acceleration based on the cushion force of the air cushion 10 is detected at time t 1. Thereafter, the acceleration shifts to a decreasing trend, and becomes "0" at time t 3. Thereafter, the detected acceleration is negative and becomes the minimum value (about-3G) at time t 4.
Comparing the graphs of both, it is found that the air cushion 10 of the present embodiment has a lower maximum peak of acceleration (8.4G in the present embodiment and 11G in the comparative example) and a longer time (about 60 milliseconds in the present embodiment (t 2-t 1) and about 50 milliseconds in the comparative example (t 12-t 11) from the time when the weight comes into contact with the air bag to the peak, as compared to the air cushion 20 of the comparative example.
This means that when the air cushion 10 is used as an air cushion, the increase in air pressure inside the airbag receiving the impact is suppressed by the movement of air through the air flow path 6 having high flow path resistance.
As can be seen from the above, the air cushion of the present embodiment has high cushioning properties.
In the conventional product shown in fig. 15, since there is no flow path resistance in the air flow path between the adjacent air cells, the air in the air cell that has been subjected to the impact is immediately released to the adjacent air cell, and therefore, the cushioning ability is significantly inferior to that of the product of the present embodiment.
[5] Manufacturing method
An example of the method for manufacturing the air-cushion 10 will be described with reference to fig. 9(a) to (c) and fig. 10(a) to (d).
First, as shown in fig. 9(b) and (c), the front-side sheet portion 4 and the back-side sheet portion 5 are obtained by folding one long sheet 10s of a large sheet shown in fig. 9 (a).
Next, as shown in fig. 10(a), the edges 10a, 10b, and 10c of the front-side sheet portion 4 and the back-side sheet portion are sealed by welding Se1, Se2, and Se11, thereby obtaining a bag body 10H.
The central portion 10mid of the bag 10H in fig. 10(a) is folded and projected upward, so that the intermediate band-like portion 3 is formed as shown in fig. 10(b), and Se12 and Se13 are fused.
The air is fed from the edge 10c side by a blower to inflate the inside of the airbag 1, and then the portion of the airbag 1 in the edge 10c is sealed by welding. As a result, the air cushion 10 is in the state shown in fig. 10 (c). Similarly, the air is fed from the edge 10c side by the blower to inflate the airbag 2, and then the portion of the airbag 2 in the edge 10c is sealed by welding.
As a result, the air cushion 10 is in the state shown in fig. 10(d), and the edge 10c is sealed by the welded portion Se 3. Further, the air may be blown into the airbags 1 and 2 at the same time, and the entire peripheral edge 10c may be welded and sealed at one time.
The state of fig. 9(c) may be produced by using two sheets. In fig. 10(c) and (d), an air blowing port may be provided at a corner of the welded portion of each airbag, and the portion may be sealed by welding after air is blown.
[6] Summary of the invention
As described above, according to the present embodiment, the air flow path 6 formed in the intermediate belt-shaped portion 3 is folded at a halfway portion, and therefore, the air passing through the air flow path 6 receives a large flow path resistance.
Since the airflow generated by an external impact moves to the other airbag through the airflow passage 6, the rapid inflation of the airbag at the destination of the inflow of air can be avoided by reducing the moving speed of the airflow passing through the airflow passage 6 while suppressing the increase in the internal pressure of the internal space of the airbag at the side receiving the impact.
In addition, the air cushion 10 of the above embodiment can improve the cushioning performance of the air cushion without additionally providing another member such as a check valve, and thus can be transported at low cost and high quality.
The air cushion according to the above embodiment can have sufficient cushioning properties, and can also contribute to resource saving by reducing the amount of petroleum-derived materials used as compared with polystyrene foam or the like.
[ modified examples ]
The present invention has been described above with reference to the embodiments, but the present invention is not limited to the above embodiments and can be modified as follows.
(modification 1)
In the above embodiment, the angle of the airbag 2 with respect to the airbag 1 can be freely changed with the intermediate belt-shaped portion 3 as a boundary. However, this requires that the intermediate belt-like portion 3 be inserted between the packaging box and the object to be packaged after being formed into an L-shape while being checked every time when it is attached to the package, which is troublesome.
Therefore, in the present modification, the air cushion member 10 is processed and maintained in a state of being bent into a substantially L-shape in a state where the intermediate strip-shaped portion 3 is located inside.
Fig. 11(a) and (b) are views showing the air-cushion 10 in a state where the portions 10neck1 located near the base of the intermediate strip-shaped portion 3 and on the opposite side of the air flow path 6 in the airbags 1 and 2 are sandwiched and welded. Fig. 11(a) shows the overall appearance of the air cushion 10, and fig. 11(b) shows a side view thereof.
By the welding, the air bags 1 and 2 maintain the posture in which the intermediate belt-shaped portion 3 is positioned inside and bent at a predetermined angle (the angle is not necessarily exactly 90 °, and may be an angle such that the air cushion 10 with the intermediate belt-shaped portion 3 positioned inside is clearly known to the packaging worker and bent, for example, in a range of 70 ° to 120 °), and therefore, the air bags can be easily attached to the package.
The means for maintaining the air cushion 10 in the bent posture (posture maintaining means) as described above is not limited to the case of fixing the portion 10 hack 1 by welding, and may be fixed by an adhesive or may be held by a clip or the like. The fixing portion may be formed over the entire longitudinal direction of the intermediate belt-like portion 3 or may be a partial range.
(modification 2)
In the above embodiment, the air flow passage 6 is formed only at one position in the longitudinal direction of the intermediate belt-shaped portion 3 (see fig. 1 and 4), but the air flow passage may be provided at two positions in the longitudinal direction of the intermediate belt-shaped portion 3.
Fig. 12(a) is an external view of the air-cushion 10 of the present modification, fig. 12(b) is a front view of the airbag 2 when viewing only the intermediate strip-shaped portion 3, and fig. 12(c) is a view showing the rear surface of the intermediate strip-shaped portion 3 of fig. 12 (b).
As shown in the figures, the air flow passage 15 is formed in one end portion near portion 3e1 in the longitudinal direction of the intermediate belt-like portion 3, and the air flow passage 16 is formed in the other end portion near portion 3e 2.
By providing two air flow passages in this manner, even if one air flow passage is blocked for some reason, air moves to the adjacent airbag through the other air flow passage, and therefore, breakage of the airbag receiving an impact can be prevented, and good cushioning properties can be maintained.
The positions at which the two air flow passages are provided do not necessarily need to be near both ends of the intermediate belt-shaped portion 3 as shown in fig. 12, but are preferably provided at positions symmetrical in the longitudinal direction of the intermediate belt-shaped portion 3 (positions equidistant from the center in the longitudinal direction of the intermediate belt-shaped portion 3).
By providing the air flow paths at symmetrical positions in this way, when the airbag 1 receives a large external force, the air flow from the airbag 1 can be substantially equally divided into the two air flow paths and flow out to the airbag 2 side, so that the deformation amount of the airbag 1 receiving the external force in the direction along the intermediate belt-shaped portion 3 can be easily made uniform, and an effect of eliminating positional deviation of the damping force can be expected.
Further, the number of the airflow passages may be 3 or more. In this case, too, the plurality of air flow passages are preferably provided at positions symmetrical in the longitudinal direction of the intermediate belt-like portion 3.
(modification 3)
In the above embodiment, the airflow path 6 is formed so as to be linearly provided from the airbag 1 to the airbag 2 and folded back and overlapped at the top portion 3t of the intermediate belt-shaped portion 3 (see fig. 1 and 4).
In contrast, in the air-type cushion member 10 of modification 3, the air flow path is formed to penetrate the intermediate strip-shaped portion 3 in a manner bent in a crank shape in the middle.
Fig. 13(a) is an external view of the air-cushion 10 of the present modification, fig. 13(b) is a front view of the airbag 2 when viewing only the intermediate strip-shaped portion 3, and fig. 13(c) is a view showing the rear surface of the intermediate strip-shaped portion 3 of fig. 13 (b).
As shown in fig. 13 b, the flow passage 17 (1 st passage) from the base portion 3v to the apex portion 3t on the airbag 2 side of the folded intermediate strip-shaped portion 3 is formed at a portion 3e1 near the end in the longitudinal direction of the intermediate strip-shaped portion 3, and as shown in fig. 13 c, the flow passage 18 (3 rd passage) from the base portion 3r to the apex portion 3t on the airbag 1 side of the intermediate strip-shaped portion 3 is formed at a portion 3e2 near the other end in the longitudinal direction of the intermediate strip-shaped portion 3.
A connecting passage 19 (2 nd passage) connecting these air flow passages 17, 18 is formed along the longitudinal direction of the top portion 3t of the intermediate belt-shaped portion 3 (fig. 13 b).
According to this modification, even if the height h1 (see fig. 4) of the intermediate strip-shaped portion 3 is limited, the path length of the long airflow path can be ensured, and the flow path resistance of the airflow path can be increased by a required amount, so that the cushioning ability of the air cushion 10 can be improved.
(modification 4)
In the air cushion 10 of fig. 1, the entire longitudinal direction of the intermediate strip-shaped portion 3 is folded, but as shown in the external view of fig. 14, the flow path resistance can be imparted to the air flow path 6 by only folding at least the portion of the intermediate strip-shaped portion 3 where the air flow path 6 is present, and therefore the same effects as those of the above-described embodiment can be obtained.
(modification 5)
In the intermediate band-shaped portion 3 shown in fig. 1 and 4, the edges 10a, 10b and the edge 10c are welded to maintain the airtightness of the airbags 1, 2, but the edges 10a, 10b and the edge 10c may be bonded with an adhesive to maintain the airtightness of the internal space.
(modification 6)
The air cushion 10 shown in fig. 1 is configured such that two air cells are coupled via the intermediate strip-shaped portion 3, but may be configured such that 3 or more air cells are coupled via two or more intermediate strip-shaped portions, and an air flow path is provided in each intermediate strip-shaped portion and folded. In the case where 3 or more airbags are connected, the posture maintaining means in modification 1 need not be formed in all the intermediate belt-like portions, and may be formed only in any 1 intermediate belt-like portion.
The above-described embodiments and modifications may be combined as long as possible.
Industrial applicability of the invention
The present invention is suitable as an air cushion used for packaging articles such as an image forming apparatus.

Claims (9)

1. An air-type buffer member, which is characterized in that,
a belt-shaped portion is present between the 1 st airbag and the 2 nd airbag in which air is enclosed, the side edges of the 1 st airbag and the 2 nd airbag are connected via the belt-shaped portion,
the belt-shaped portion is a protruding folded-shape portion formed by being folded in a mountain-shape, an airflow passage communicating the 1 st airbag and the 2 nd airbag is formed in the belt-shaped portion, and at least a portion of the belt-shaped portion including the airflow passage is folded in a middle of the belt-shaped portion from the 1 st airbag to the 2 nd airbag,
wherein the belt-shaped portion includes a pair of seal portions extending from one of the 1 st and 2 nd airbags to the other of the 1 st and 2 nd airbags, and a 3 rd seal portion extending perpendicularly and joined to one of the pair of seal portions.
2. The air cushion of claim 1,
the airbag device is provided with a posture maintaining means for maintaining the 1 st airbag and the 2 nd airbag in a mutually folded posture with the folded portion of the belt-shaped portion positioned inside.
3. The air cushion according to claim 1 or 2,
the airflow passages are provided at least at two positions symmetrical in the longitudinal direction of the belt-shaped portion.
4. The air cushion according to claim 1 or 2,
the airflow path includes a1 st path that opens into a1 st airbag, a2 nd path that is provided along a longitudinal direction of the belt-shaped portion, and a 3 rd path that opens into a2 nd airbag, and the 1 st path and the 3 rd path are connected via the 2 nd path.
5. The air cushion according to claim 1 or 2,
the folded portion of the belt-shaped portion is welded along the longitudinal direction of the belt-shaped portion, and the 1 st and 2 nd airbags are formed so as to be separated by 1 space.
6. The air cushion according to claim 1 or 2,
of the 1 st and 2 nd airbags, the 1 st airbag is disposed so as to protect one surface of the object while sandwiching a corner portion of the object, and the 2 nd airbag is disposed so as to protect the other surface while sandwiching the corner portion of the object.
7. The air cushion according to claim 1 or 2,
at least a portion of the strip portion including the airflow passage is a portion to be disposed so as to face a corner portion of the object to be packaged.
8. The air cushion of claim 6,
the packaging object is an article to be transported.
9. The air cushion of claim 7,
the packaging object is an article to be transported.
CN201810143532.9A 2017-02-17 2018-02-12 Air type buffer piece Active CN108455073B (en)

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US20180237201A1 (en) 2018-08-23

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